Ratchet wrench with a quick-rotated element which has a blocking function
A ratchet wrench with a quick-rotated element which has a blocking function, includes a shank and a ratchet wheel pivotally received in one end of the shank. The ratchet wheel includes a polygonal hole centrally and longitudinally defined therein. The polygonal hole extends through the ratchet wheel. An annular groove is laterally defined in an inner periphery of the polygonal hole. A disk is attached to a top of the ratchet wheel and has a through hole defined therein. The through hole has a diameter smaller than that of the polygonal hole. A retainer partially is received in the annular groove in the ratchet wheel, wherein the retainer is adapted to position a tool bit that is partially and longitudinally received in the polygonal hole.
1. Field of the Invention
The present invention relates to a ratchet wrench, and more particularly to a ratchet wrench with a quick-rotated element which has a blocking function.
2. Description of Related Art
A conventional ratchet wrench in accordance with the prior art shown in
Another conventional ratchet wrench in accordance with the prior art shown in
The present invention has arisen to mitigate and/or obviate the disadvantages of the two conventional ratchet wrenches.
SUMMARY OF THE INVENTIONThe main objective of the present invention is to provide an improved ratchet wrench with a quick-rotated element which provides a blocking function.
To achieve the objective, the ratchet wrench in accordance with the present invention comprises a shank and a ratchet wheel pivotally received in one end of the shank. The ratchet wheel includes a polygonal hole centrally and longitudinally defined therein. The polygonal hole extends through the ratchet wheel. An annular groove is laterally defined in an inner periphery of the polygonal hole. A disk is attached to a top of the ratchet wheel and has a through hole defined therein. The through hole has a diameter smaller than that of the polygonal hole. A retainer partially is received in the annular groove in the ratchet wheel, wherein the retainer is adapted to position a tool bit that is partially and longitudinally received in the polygonal hole.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to the drawings and initially to
A disk (20) is mounted to the upper end of the ratchet wheel (12) and has a through hole (21) centrally defined therein. The through hole (21) in the disk (20) has a diameter smaller than that of the polygonal hole (120). The disk (20) has a second protrusion (22) extending from a bottom thereof and securely sleeved on the first protrusion (121) of the ratchet wheel (12) to hold the disk (20) in place. The disk (20) has a diameter greater than that of the enlarged end (11) of the shank (10) such that the operator can quickly drive the ratchet wheel (12) by rotating the disk (20) to shorten the operating time.
A C-shaped ring (40) is received in the first annular groove (110).
A tool bit (50) is inserted into the polygonal hole (121) for driving a fastener (not shown). The tool bit (50) has a third annular groove (51) laterally defined in an outer periphery of the tool bit (50).
A direction control unit (60) is mounted in the enlarged end (11) for controlling the operating direction of the ratchet wheel (12).
With reference to
With reference to
With reference to
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
Claims
1. A ratchet wrench with a quick-rotated element which has a blocking function, comprising:
- a shank and a ratchet wheel rotatably received in one end of the shank, the ratchet wheel including a polygonal hole centrally and longitudinally defined therein, the polygonal hole extending through the ratchet wheel, an annular groove laterally defined in an inner periphery of the polygonal hole;
- a separably formed disk attached to a top of the ratchet wheel and having an axial bore extending therein, the disk having an annular upper surface projecting radially inward into the axial bore to define a through hole having a diameter smaller than the polygonal hole; and
- a retainer partially received in the annular groove in the ratchet wheel, the retainer adapted to position a tool bit that is partially and longitudinally received in the polygonal hole, the tool bit having a top abutting a periphery of the through hole in the disk such that the tool bit is stably positioned between the ratchet wheel and the disk;
- wherein the ratchet wheel has a first protrusion longitudinally extending from a top rim surface thereof for insert into the axial bore of the disk, and the disk has a second protrusion extending from a bottom about the axial bore, the second protrusion being securely sleeved about the first protrusion and spaced from the top rim surface of the ratchet wheel to define a retaining space within the end of the shank.
2. (canceled)
3. The ratchet wrench as claimed in claim 1, wherein the annular groove is defined under a middle section of the ratchet wheel.
4. The ratchet wrench as claimed in claim 1, wherein the through hole in the disk is centrally defined in the disk.
5. The ratchet wrench as claimed in claim 1, wherein the second protrusion centrally extends from the bottom of the disk.
6. The ratchet wrench as claimed in claim 1 further comprising a direction control unit mounted in the end of the shank for controlling the operating direction of the ratchet wheel.
7. The ratchet wrench as claimed in claim 1 wherein the first protrusion of the ratchet wheel terminates at an annular end including a surface tapered radially inward.
8. The ratchet wrench as claimed in claim 7 wherein an inner peripheral portion of the disk disposed substantially above the annular end of the first protrusion includes a surface tapered radially inward to the through hole.
Type: Application
Filed: Nov 18, 2005
Publication Date: May 24, 2007
Inventor: Hsien-Chung Tuan Mu (Taichung)
Application Number: 11/281,425
International Classification: B25B 13/46 (20060101);